25 Java Developer Interview Questions & Answers

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Here’s the FULL LIST of JAVA DEVELOPER INTERVIEW QUESTIONS AND ANSWERS:

Q1. Introduce yourself and tell me why you want to become a Java Developer?

SUGGESTED ANSWER:

“I have been a Java Developer for a number of years now and since I first started work, I have constantly sought to improve and develop my skills. I am proficient with programming languages; I have an inquisitive nature that ensures I analyze my work and the problems I encounter in detail; I am quick to learn new concepts and can apply them to a variety of situations, and I am a strong team worker who can collaborate with and work alongside others to complete challenging projects and also resolve complex issues and problems. I am highly self-motivated, technically astute and you can rely on me to get up to speed quickly in the role whilst being a cooperative, responsive and adaptable member of your team.”

Q2. Why do you want to work for our company as a Java Developer?

SUGGESTED ANSWER

“Although I do get engrossed in my work as a Java Developer, the company I work for is still very important to me. I have to feel supported in my work; I want to feel like I am continually growing and improving, and I want to know that I am contributing to the wider team goals. Therefore, before applying to become a Java Developer with your company, I spent quite a bit of time researching your values, your products and services and the likely job satisfaction levels I will have if I work for you. During my research, everything pointed to the fact that this is a great place to work. You are ambitious, you set high standards, you are creative and innovative, and you clearly support your staff so they can be the best they possibly can be. I genuinely want to work here, and I feel it will be somewhere I can stay working at for a long period of time.”

Q3. Tell me about time where you had to work under pressure?
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Q4. What is meant by the term “platform independent” and how is it related to Java?
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Q5. In Java, what is meant by the term “Wrapper Classes”?
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Q6. Why should we hire you in this Java Developer role?
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Q7. What is Java?
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Q8. What is the difference between JRE, JVM, and JDK?
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Q9. Describe the fundamental difference or differences between an Array list and vector in Java?
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Q10. What are constructors?
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Q11. What are the core elements or features of Java?
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Q12. Describe some of the differences between Java and Python?
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Q13. What is Java Garbage Collection?
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Q14. How does Java Garbage Collection work?
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Q15. What are some of the differences between C++ and Java?
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Q16. Explain why Java is not a pure object-orientated language?
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Q17. What is Java String Pool?
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Q18. Tell me a time when provided outstanding customer or client service as a developer?
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Q19. Describe a time when you failed as a Java Developer?
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Q20. When you encounter bugs and issues as a Java Developer, what problem-solving process do you follow?
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Q21. How do you keep up to date with java developments and technology advancements?
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Q22. Where do you see yourself in 5 years' time?
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Q23. Why do you want to leave your current job?
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Q24. What are your salary expectations in this Java Developer role?
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Q25. That’s the end of your Java Developer interview, do you have any questions for the panel?
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Java Developer Job Description, and Responsibilities


Java Developers are critical to the effective functioning and continuing success of certain organizations. As a Java Developer, you will have responsibility for numerous IT projects within the organization including the development of applications, architectural development and the creation and testing of code for java programs. The skills and qualities needed to perform to the necessary standards including technical competence, a thorough understanding of Java applications and software, strong communication skills, problem solving capabilities, the desire to stay up to date with technical developments and the ability to work at pace.

JAVA DEVLOPER DUTIES & RESPONSIBILITIES

  • Developing and testing of Java application software;
  • Resolving production and non-production application problems and issues;
  • Carrying out software analysis, debugging and testing in line with Java protocol;
  • Designing Java application phases;
  • Assess current Java application processes with a view to making improvement recommendations;
  • Work with JavaServer pages, web frameworks and servlets;
  • Demonstrate competency in technology including HTML, JQuery, SQL, CSS and JavaScript;
  • Work alongside other Java Developers, IT Engineers and stakeholders to achieve the commercial objectives of the organization;
  • Explain issues to the IT manager in simple, easy to understand language;
  • Contribute to all aspects of the development lifecycle;
  • Writing effective and useable code.

JAVA DEVELOPER INTERVIEW TIPS – HOW TO PASS A JAVA DEVELOPER INTERVIEW

If you are preparing for a Java Develop interview, the following tips will significantly help increase your chances of success. Read each of the tips carefully and implement the advice during your pre-interview preparation.

JAVA DEVELOPER INTERVIEW TIP #1

The interview will consist of motivational, behavioural and technical-based questions. In addition to brushing up on your java technical competence, consider carefully why you want to be a Java Developer, where you see yourself in five years’ time, what you can bring to the role and why they should hire you. Don’t get caught out by failing to prepare for the basic interview questions featured on this page!

JAVA DEVELOPER INTERVIEW TIP #2

One of the most important aspects of being a Java Developer is staying on top of the latest technical and industry developments. Be prepared for an interview question that assesses how you maintain competence within your role.

JAVA DEVELOPER INTERVIEW TIP #3

Two important areas to prepare for are questions that focus on the architecture of a Java project you are working on, and also which features of the latest Java software you find the most useful. Java Architecture is essentially the process of compilation and interpretation. You need to be able to describe competently the different processes involved whilst you are creating and developing a Java program.

JAVA DEVELOPER INTERVIEW TIP #4

The interview questions listed on this page are the ones we believe are likely to feature during your Java Developer interview. We strongly advise you prepare answer to all of the questions listed. By doing so, you will increase your chances of success significantly! Finally, during your pre-interview preparation, be sure to research the company in detail and be able to explain why you want to work for them as a Java Developer.

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Question 1,
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Interview Question 01

Question 2,
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Interview Question 02

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Interview Question 03

Question 4,
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Interview Question 04

Question 5,
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Interview Question 05

Question 6,
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Interview Question 06

Question 7,
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Interview Question 07

Question 8,
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Interview Question 08

Question 9,
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Interview Question 09

Question 10,
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Interview Question 10

Question 11,
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Interview Question 11

Question 12,
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Interview Question 12

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